Brake disc knowledge sharing - brake disc temperature and thermal decay phenomenon by Asiautos Auto Parts(CHINA CAR Aftermarket Parts Expert)

Edited by Asiautos Auto Part

What is brake fade?

Thermal decay phenomenon

Thermal fade is usually related to the brake system, especially in high temperature environments, where the brake pads or brake system performance degrades due to excessive temperature. For example, in electric vehicles, due to the use of wire-controlled brake systems, brake thermal fade may cause a significant decrease in braking ability, but the brake feel will not become soft.

Thermal decay in other areas

In the study of lithium battery temperature monitoring, double-clad FBG sensors show obvious thermal decay characteristics at high temperatures, that is, as the temperature increases, the reflection intensity decreases rapidly.

The importance of thermal design

The heat dissipation design of the brake disc is crucial to prevent thermal decay. For example, a brake disc with ventilation ducts can dissipate heat to the surrounding air faster, thereby reducing the temperature of the brake disc surface. In addition, some high-performance brake discs use perforated designs or special coatings to enhance heat dissipation.

Brake discs of different materials and geometries have different heat dissipation performance. For example, materials such as gray cast iron and titanium alloy have different thermal conductivity, and the design of the heat dissipation channel (such as vents and grooves) will also affect the heat dissipation effect. Therefore, the heat dissipation performance of the brake disc can be significantly improved by rationally selecting materials and optimizing the design.

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